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Finding the Third Proportional to 1,420.50 and 2,912.25

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Solution

The third proportional to 1,420.50 and 2,912.25 is: 5,970.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.50 : 2,912.25 = 2,912.25 : x
  2. Step 2: Convert to fraction form
    1,420.50/2,912.25 = 2,912.25/x
  3. Step 3: Cross multiply
    1,420.50x = 2,912.25 × 2,912.25
  4. Step 4: Simplify right side
    1,420.50x = 8,481,200.06
  5. Step 5: Solve for x
    x = 8,481,200.06/1,420.50
  6. Step 6: Final answer
    x = 5,970.57

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.